This technical note examines how AI transformed the marketing process of Publicis Sapient, a multibillion-dollar technology company. Using Publicis Sapient's journey as an example of how a firm's marketing function adopted AI, the note outlines how early AI efforts fell short and the steps taken to achieve genuine transformation. This note provides five steps for redesigning marketing work, discusses the outcome of AI adoption for Publicis Sapient, and presents lessons that leaders can use for implementing AI-enabled transformation at their own companies.